Insects; rugby team (5)
I believe the answer is:
wasps
This clue is a double definition.
'insects' is the first definition.
(I know this)
'rugby team' is the second definition.
(Wasps Rugby Football Club)
(Other definitions for wasps that I've seen before include "Members of rugby team" , "Striped stinging insects" , "Ones playing together" , "Rugby club" , "Insects; rugby union team" .)